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World's Air Pollution: Real-time Air Quality Index
Air Quality Scale
Good
Moderate
Unhealthy
for sensitive groups
Unhealthy
Very
Unhealthy
Hazardous
The website is brought to you by the World Air Quality Index projectThe above map shows the real-time air quality for more than 10,000 stations in the world.
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Share: How polluted is the air today? Check out the real-time air pollution map, for more than 80 countries.

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The GAIA air quality monitoring stations are using high-tech laser particle sensors to measure in real-time PM2.5 pollution, which is one of the most harmful air pollutants.

Very easy to set up, they only require a WIFI access point and a USB power supply. Once connected, air pollution levels are reported instantaneously and in real-time on our maps
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About the World Air Quality Index project

How to use this web application

To get more information about a specific city, move your move over any of the the flags in the above map, then click to get the full air pollution historical data.

aqi-0-50Goodaqi-100-150
Unhealthy
for sensitive groups
aqi-200-300
Very
Unhealthy
aqi-50-100Moderateaqi-150-200Unhealthyaqi-300-500Hazardous

Air Quality Index (AQI) Calculation

The Air Quality Index is based on measurement of particulate matter (PM2.5 and PM10), Ozone (O3), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2) and Carbon Monoxide (CO) emissions. Most of the stations on the map are monitoring both PM2.5 and PM10 data, but there are few exceptions where only PM10 is available.

All measurements are based on hourly readings: For instance, an AQI reported at 8AM means that the measurement was done from 7AM to 8AM.

Further information and links

Air Quality Scale

The AQI scale used for indexing the real-time pollution in the above map is based on the latest US EPA standard, using the Instant Cast reporting formula.

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

Credits

All the credits must go to the worlwide EPA (Enviromental Protection Agencies), as all this work is only made possible thanks to their work. Check the full worldwide EPA list page.
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Cities with the worst air pollution right now

Top 10 countries with the worst air pollution index

Usage Notice

All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.
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This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com.
This product includes geolocation from LocationIQ.com.
Some of the icons made by Freepik from www.flaticon.com is licensed by CC 3.0 BY.

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